The Niceyrig Gimbal Clamp with NATO Rail for Zhiyun-Tech CRANE 2S secures solidly around the gimbal handle and provides a NATO rail for attaching NATO-mount handgrips, also many 1/4-20 holes for a variety of attachments, for improved underslung operation.  Stong enough to support a side handle, magic arm & monitor, etc.  

This clamp has an almost undetectable nick on its inner edge so we have not described it as open-box.  

Clamp has an anti-skid pad on the interior for scratch-free attachment to the gimbal (see photos). It secures tightly around the gimbal via its large adjustment knob.  NOTE that this clamp design may fit other gimbals with similar, non-slanted handle diameters, but is not universally designed for other models like DJI or Weebill.  I mounted this clamp on my Zhiyun Weebill 2 handle but it required wrapping with layers of tennis tape (inexpensive at sporting goods stores) to make it fit snugly. This gave the gimbal an attachment point for a screw-in eyelet and my Smallrig neck strap.